Firefly Oasis Battery – Carbon foam AGM - Printable Version

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+--- Thread: Firefly Oasis Battery – Carbon foam AGM (/showthread.php?tid=5275)

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RE: Firefly Oasis Battery – Carbon foam AGM - cknuth - 04-02-2020


Here's a sketch of the system I've been compiling.    Comments welcome.
C

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RE: Firefly Oasis Battery – Carbon foam AGM - Richard - 04-02-2020

I dont think you need the isolator with the B2B

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RE: Firefly Oasis Battery – Carbon foam AGM - cknuth - 04-03-2020

The folks at BattleBorn agree that the isolation is taken care of by the B2B charger.
Battle Born additional comments:
- Keep using the Echo Charger for starter battery maintenance while on shore power.
- It should be OK to run the generator while driving, since the output of the inverter/charger (125A) and the B2B charger (60A) are well within what the Lithum bank will accept.

I am curious about what may happen if the two chargers are putting out slightly different voltages. I plan to program both chargers to output the recommended lithium profile but assume the timing of voltage changes will not sync up.

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RE: Firefly Oasis Battery – Carbon foam AGM - folivier - 04-03-2020

Chargers whether it's the alternator or inverter/charger look at the voltage at the battery and put out its charge based on that. IOW if the battery is at 12.5 volts it will assume it needs a full charge. But if battery is at 13.8 because of one charger working first, the other charger will assume it is almost fully charged and should cut back the amps and voltage. So I guess it depends on what source starts charging first. At least that's what my feeble mind thinks.

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RE: Firefly Oasis Battery – Carbon foam AGM - cknuth - 04-03-2020

That sounds right, Forest. At least until the system is stable enough to support controlled experiments, I'll be inclined to take the B2B off line if the genny's going to be used en route. Cheers.

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RE: Firefly Oasis Battery – Carbon foam AGM - Latitude 28 - 05-01-2020

Chuck,
Have a couple of questions for you on the Sterling B2B charger. Where are you planning on putting the sterling unit? Looks like there will be some sort of wire run from the chassis battery to the house batteries....what will be your preferred wire routing?

Thanks

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RE: Firefly Oasis Battery – Carbon foam AGM - Richard - 05-02-2020

Steve,

Are you talking about a sense wire, or a heavy wire for charging the house?

Heavy wire for charging the house is already there, if you take the isolator out, you are in business. Use the heavy wire off the top isolator post, the one that connects to the house side of the merge solenoid. Bingo.

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RE: Firefly Oasis Battery – Carbon foam AGM - Latitude 28 - 05-02-2020

Richard,
I was talking about the main power wire....okay got it...that makes sense.  So that means the B2B will be located in the area of the isolator....am I on track with that thinking.

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RE: Firefly Oasis Battery – Carbon foam AGM - Richard - 05-02-2020

Yes!

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